3. Instructions for Installation
11/10
Pub. No. 573-B
- 6 -
Instructions for Installation and Use
heater, fill rock cavity with igneous stones provided with
heater and fasten metal protective grill on top of heater. (See
gen. info concerning washing and placing of stones.)
3.3.2. 3-phase Heater Wiring and Hookup (SMS-100-3,
SMS-125-3, SMS-145-3)
Refer to table 2 for proper wire size and amperage. See
figures 2–6 for required clearances. Use copper wire from
breaker to wall-mounted power unit. Supply cable must have
4 wires including insulated neutral and separate ground.
Use 90 °C copper wire from power unit to room light. Also
use 90 °C copper wire from power unit to sauna heater
(within seal tight flex conduit), and connect to junction box
under heater at back, with 90 °C connector.
If connection to heater will be made at a later time, bring
flex into sauna room 4–6” from floor, and leave 3’ of flex for
hookup (can be cut to right length later). Before testing
heater, fill rock cavity with igneous stones provided with
heater and fasten metal protective grill on top of heater. (See
gen. info concerning washing and placing of stones.)
3.4. After Installation
3.4.1. Testing of Sauna Heater
1. After sauna heater has been properly wired, according to
appropriate wiring diagram and local codes, turn sauna
breaker on in the main breaker panel. (Note: Electrician
must label “Sauna” breaker.)
2. Turn thermostatic (heat) control to on position (this is
located either on your heater or on your remote wall
control. If you have a wall control, the indicator light will
come on to show that the sauna is heating). Set timer to 10
or 15 minutes.
3. Within 5 minutes, you should be able to feel heat from
heater elements when holding your hand over heater.
4. If the sauna does not heat, refer to troubleshooting
information.
5. It is normal for smoke to appear during the first heating, as
protective element coating needs to burn off. Turn sauna
on for 1 hour before using the first time, to eliminate
smoking.
3.4.2. Troubleshooting
A. If the sauna heater does not operate after initial
installation and wiring:
1. Make sure that a neutral wire has been included. This is
necessary for all heaters except model with built-in
control).
2. Check circuit breaker in contactor to be sure that it has not
been shorted out.
3. Make sure that the current from the control unit to the
heater has been switched on.
4. Check that the desired temperature programmed in the
control panel is higher than the temperature of the sauna.
B. If the sauna has been in operation, but the heater
ceases to operate:
1. Check breaker to make sure it is on.
2. Check that there is on time left in the control panel.
3. Check overheat limiter reset button in heater (reset is
under the heater) to see if it has been released.
4. Call your electrician or service person for further help.
NOTE: A GROUND FAULT INTERRUPTER (GFI) should not
be installed in and does not belong in a sauna. If used, the
breaker will trip, and damage could result.
C. If the sauna heater operates, but the sauna room does
not come up to sauna temperature (149–176 ºF)
1. You must allow at least 30 minutes for sauna heat-up time.
2. Is the sauna thermometer located 6” from ceiling, and is it
above or close to the sauna heater? (This is proper
location for sauna temperature reading.) Thermometer
readings vary with room heights and location. Eg.180 ºF
above sauna heater = 165 on opposite wall = 140 on upper
bench level = 120 on lower bench level = 100 at floor level.
Table 1
Model
Heater kW
Minimum
Ceiling
Height
Minimum
Floor Area
in Square
Feet
Maximum
Floor Area
in Square
Feet
Sauna Room
Minimum
Cubic Feet
Sauna Room
Maximum
Cubic Feet
Minimum
Spacing From
Adjacent
Surfaces
SMS-100
SMS-100-3
SMS-125
SMS-125-3
SMS-145
SMS-145-3
10 kW
12.5 kW
15 kW
6'-6"
6'-6"
6'-6"
60
78
97
94
114
146
390
500
630
600
750
1000
5 inches
6 inches
6 inches
Model
SMS-100-3
SMS-125-3
SMS-145-3
Watts
9,800
12,300
14,400
Amps
27.3
34.1
40.0
Voltage
208
208
208
Phase
3
3
3
Breaker to Power Unit
1@35A - #8 AWG copper 90°C
1@45A - #6 AWG copper 90°C
1@50A - #6 AWG copper 90°C
Power Unit to Heater
#8 AWG copper 90°C
#6 AWG copper 90°C
#6 AWG copper 90°C
Control
S170-3
S170-3
S170-3
S170-1
S170-1
S170-1
SMS-100
SMS-125
SMS-145
10,000
12,600
14,800
41.7
52.5
61.7
240
240
240
1
1
1
Breaker to Load Center
1@60A - #4 AWG copper 90°C
1@70A - #4 AWG copper 90°C
1@80A - #3 AWG copper 90°C
Load Center to Power Unit
2@35A - #8 AWG copper 90°C
2@35A - #8 AWG copper 90°C
2@40A - #8 AWG copper 90°C
Power Unit to Heater
#8 AWG copper 90°C
#8 AWG copper 90°C
#8 AWG copper 90°C
Table 2
Note: neutral wire required
